Janet Marsico uses her vaping device as she samples different flavors of e-liquid at White Plains Vapors April 24, 2014. The Food and Drug Administration will propose rules for e-cigarettes, which will have big implications for a fast-growing industry and its legions of customers. Matthew Brown / The Journal News

Lou Pasquin and Janet Marsico use their vaping devices as they samples different flavors of e-liquids available at White Plains Vapors April 24, 2014. The Food and Drug Administration will propose rules for e-cigarettes, which can have big implications, if approved, on a fast-growing industry and its legions of customers. Matthew Brown / The Journal News

Lou Pasquin uses his vaping device as he samples different flavors of e-liquids available at White Plains Vapors April 24, 2014. The Food and Drug Administration will propose rules for e-cigarettes, which can have big implications, if approved, on a fast-growing industry and its legions of customers. Matthew Brown / The Journal News

Janet Marsico use her vaping device as she samples different flavors of e-liquids available at White Plains Vapors April 24, 2014. The Food and Drug Administration will propose rules for e-cigarettes, which can have big implications, if approved, on a fast-growing industry and its legions of customers. Matthew Brown / The Journal News

Janet Marsico, and Lou Pasquin, behind her, use their vaping devices as they sample different flavors of e-liquids available at White Plains Vapors April 24, 2014. The Food and Drug Administration will propose rules for e-cigarettes, which can have big implications, if approved, on a fast-growing industry and its legions of customers. Matthew Brown / The Journal News

Samples of e-liquids are displayed at White Plains Vapors April 24, 2014. The Food and Drug Administration will propose rules for e-cigarettes, which can have big implications, if approved, on a fast-growing industry and its legions of customers. Matthew Brown / The Journal News

Samples of vamping devices are displayed at White Plains Vapors April 24, 2014. The Food and Drug Administration will propose rules for e-cigarettes, which can have big implications, if approved, on a fast-growing industry and its legions of customers. Matthew Brown / The Journal News

Michael Bowers, owner of White Plains Vapors, is photographed April 24, 2014 in his White Plains shop. The Food and Drug Administration will propose rules for e-cigarettes, which can have big implications, if approved, on a fast-growing industry and its legions of customers. Matthew Brown / The Journal News

Warning labels are clearly display on these e-liquids, photographed April 24, 2014 at Honest Vapors in Harrison. The Food and Drug Administration will propose rules for e-cigarettes, which can have big implications, if approved, on a fast-growing industry and its legions of customers. Matthew Brown / The Journal News

The hands of Rosanna Manente hold one of several vaping devices, photographed April 24, 2014, available to customers of Honest Vapors in Harrison. The Food and Drug Administration will propose rules for e-cigarettes, which can have big implications, if approved, on a fast-growing industry and its legions of customers. Matthew Brown / The Journal News

Rosanna Manente and her brother Luciano Manente are photographed April 24, 2014, at their shop Honest Vapors in Harrison. The Food and Drug Administration will propose rules for e-cigarettes, which can have big implications, if approved, on a fast-growing industry and its legions of customers. Matthew Brown / The Journal News

A warning sign is clearly displayed at the shop of Luciano Manente, owner of Honest Vapors in Harrison. The Food and Drug Administration will propose rules for e-cigarettes, which can have big implications, if approved, on a fast-growing industry and its legions of customers. Matthew Brown / The Journal News